Prevent login redirect during change_group

Once the group changes, ongoing requests start failing.
Prevent the login redirect code from redirecting to login page in these cases, the requests are expected to fail, we're about to redirect to a new starting page anyway.

Related to #6065
(and https://bugzilla.redhat.com/show_bug.cgi?id=1741283)

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1759291

app/assets/javascripts/miq_application.js

@@ -970,6 +970,10 @@ function miqShowAE_Tree(typ) {
 // Toggle the user options div in the page header (:onclick from layouts/user_options)
 function miqChangeGroup(id) {
   miqSparkleOn();
+
+  // prevent login redirect once current requests fail after the group gets changed
+  ManageIQ.logoutInProgress = true;
+
   miqJqueryRequest(miqPassFields('/dashboard/change_group', {to_group: id}));
 }
 
@@ -1543,7 +1547,7 @@ var fontIconChar = _.memoize(function(klass) {
 
 function redirectLogin(msg) {
   if (ManageIQ.logoutInProgress) {
-    return; // prevent double redirect after pressing the Logout button
+    return; // prevent double redirect after pressing the Logout button or when changing group
   }
 
   add_flash(msg, 'warning');

app/assets/javascripts/miq_global.js

@@ -48,7 +48,7 @@ if (!window.ManageIQ) {
     i18n: {
       mark_translated_strings: false,
     },
-    logoutInProgress: false,  // prevent redirectLogin *during* logout
+    logoutInProgress: false,  // prevent redirectLogin *during* logout and group change
     mouse: {
       x: null, // mouse X coordinate for popup menu
       y: null, // mouse Y coordinate for popup menu